If the gear and sprocket assembly breaks the motor runs but the door won t move.
Garage door opener drive gear replacement.
This was a craftsman model 139 53976srt.
Replace a broken gear and sprocket assembly with the manufacturer approved replacement part.
See full descriptions for garage door opener compatibility by model numbers.
The teeth of the 41a2817 drive gear must be coated with a low temperature lithium based grease prior to operating your door opener or the gear will quickly shred.
The drive gear is designed as a sacrificial part and will shred when ever unusual stress or strain is placed on the door or opener.
This is a video on how to change the gear sprockets in a craftsman garage door opener.
Follow the steps in this repair guide and video to replace the gear and sprocket assembly in craftsman chamberlain and liftmaster chain drive garage door openers.
So if you suddenly find that the motor on your garage door opener sounds like it s running but the door is not moving checking for worn gears is the first thing you should do.
Replacement gears and sprockets for genie model garage door openers.
Shredded plastic gears are a common problem with chain driven garage door openers.
Genuine genie replacement belt and chain drive sprockets main drive gears and more.